The Nut,plain,cone Seat,hexagon, cataloged under National Stock Number 5310-00-677-3774, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Telemechanics Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-677-3774 |
| Primary Part Number | 156782 |
| Item Name | Nut,plain,cone Seat,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Width Across Flats | 0.310 INCHES NOMINAL IN |
| Thread Series | UNF |
| Nut Counterbore Depth | 0.062 INCHES NOMINAL THREADS IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Counterbore Diameter | 0.140 INCHES NOMINAL THREADS IN |
| Nut Height | 0.137 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM OVERALL |
| Nut Style | CONE SEAT, HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 156782 PRIMARY | Telemechanics Inc (USA) |
| 156782 | Lucent Technologies Inc Corporate Headquarters (USA) |
| Reference | Meaning |
|---|---|
| 156782 | 5/9 Secondary reference Lucent Technologies Inc Dba Federal Marketing Group |
| 156782 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 156782 | 5/9 Secondary reference At and T Corp |
| 156782 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 5310-00-677-3774 is a Nut,plain,cone Seat,hexagon, manufactured by Telemechanics Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-677-3774 has 2 manufacturer part numbers on file: 156782 (Telemechanics Inc), 156782 (Lucent Technologies Inc Corporate Headquarters).
Key specifications for 156782: Width Across Flats: 0.310 INCHES NOMINAL IN; Thread Series: UNF; Nut Counterbore Depth: 0.062 INCHES NOMINAL THREADS IN; Thread Direction: RIGHT-HAND. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.